Elements, Compounds, and Mixtures
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is an element?
Back
An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and carbon (C).
2.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and sodium chloride (NaCl).
3.
FLASHCARD QUESTION
Front
What is a mixture?
Back
A mixture is a combination of two or more substances that are not chemically bonded. The individual substances retain their own properties. Examples include air and salad.
4.
FLASHCARD QUESTION
Front
How can you identify a compound?
Back
A compound can be identified by its chemical formula, which shows the elements present and their ratios. For example, H2O indicates two hydrogen atoms and one oxygen atom.
5.
FLASHCARD QUESTION
Front
What is the difference between a mixture of elements and a mixture of compounds?
Back
A mixture of elements contains two or more elements that are not chemically combined, while a mixture of compounds contains two or more compounds that are not chemically combined.
6.
FLASHCARD QUESTION
Front
Is water (H2O) an element or a compound?
Back
Water (H2O) is a compound because it is made up of two hydrogen atoms and one oxygen atom chemically bonded together.
7.
FLASHCARD QUESTION
Front
What is a homogeneous mixture?
Back
A homogeneous mixture is a mixture that has a uniform composition throughout. Examples include saltwater and air.
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